JPS63205902A - rotating transformer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a rotary transformer for a home video tape recorder (CVTR).

[Conventional technology]

Regarding a method of assembling a winding wire into a winding storage groove on the inner circumferential surface of a conventional rotary transformer, Japanese Patent Application Laid-Open No. 149015/1983 has proposed. This conventional proposal utilizes a winding machine that can be inserted into the core of a cylindrical rotary transformer, and incorporates the winding directly into the winding storage groove on the inner peripheral surface of the core. However, in this case, a complicated device is required, and it is also difficult to miniaturize the device, making it impossible to wind the wire around a cylindrical rotary transformer with a small inner diameter.

[Problem that the invention seeks to solve]

As mentioned above, the conventional technology has the problem that the structure of the winding Ml [straight] is complicated and cannot be applied to small cylindrical rotary transformers. No consideration was given to elastically deforming the wire and folding it into the winding storage groove to fix it.

The present invention has been made in view of the above situation, and provides a rotary transformer that can reduce the number of man-hours and install the windings in the winding storage grooves without requiring any special equipment, and can also be made smaller. It is intended to.

[Means for solving problems]

The above purpose is to provide a rotary transformer formed in a cylindrical shape for transmitting signals between a rotating part and a fixed part of a rotary head drum device of a home video tape recorder. The winding installed in the winding storage groove is formed into one turn having a substantially circular shape with an open part formed in a part of the circumference in a free state, and is perpendicular to the plane containing the eye winding. A winding take-out portion is taken out from the winding end of the open portion, and the diameter of the outermost peripheral portion of the winding is at least larger than the inner diameter of the winding storage groove, and the winding does not include the open portion. This is achieved by a rotating transformer whose maximum outer circumference length of the wire is shorter than the maximum circumference length of the winding storage groove, which is elastically deformed by applying an external force to compress the outer diameter, and is fixed to the winding storage groove with a saw. be done.

[Effect]

As will be described later in the description of the embodiments, the winding storage groove formed on the inner circumferential surface of the cylindrical shape is formed in advance on the outside, and an open part is formed on a part of the circumference in a free state. The winding is formed by one turn having a substantially circular shape, and the winding is perpendicular to the plane containing the winding, and a winding take-out portion is taken out from the winding end of the open part, The diameter of the outermost circumference of the winding is at least greater than the inner diameter of the winding storage groove, and the maximum circumference of the winding excluding the open portion is shorter than the maximum circumference of the winding storage groove. The outer diameter of the winding is compressed against elasticity, and the winding is fixed by being installed in the winding storage groove and releasing the compression.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The rotary transformer of the present invention will be explained below using embodiments with reference to FIGS. 1 to 5. Figure 1 is a longitudinal sectional view of the core with the winding attached to the inner periphery, Figure 2, Figure 8g3 is a plan view and front view of the winding in Figure 1 in its free state, Figure 81!4, Figure 5. 2A and 2B are a plan view and a front view of the winding shown in FIG. 2 in a state in which the outer diameter is compressed when the core is pleated. In the figure, 1 is a core formed in a cylindrical shape, and a plurality of winding storage grooves 2 in which winding #I5 is stored and identified on the inner periphery.
3 is the inner diameter of the winding storage groove, and 4 is a winding pull-out groove formed on the inner periphery of the core 1. The winding 5 is in a free state (the outer diameter is not pressed) and has an open part 7 on a part of the circumference.
It is formed into one turn having a substantially circular shape, and is perpendicular to the plane containing the winding 5'fJt, and wide extension portions 6.about.6 are drawn out from the ends of the open S portion 70 winding, respectively. Further, dl is the inner diameter of the winding storage groove 5, and the inner diameter of the core 1 at the portion where the winding forest storage groove 6 is no longer formed. In addition, the outer diameter D1 of the almost circular part of winding #15 and the inner diameter 3 of the winding storage groove d
The relationship with l is D1≧d1, and the open portion 7 of @ line 5 [length on the circumference! ] The maximum circumferential length L (L=πD, -1) of the winding 5 excluding the winding 5 is shorter than the maximum circumferential length πd, ) of the winding storage groove 2, and there is a relationship of πd1. The winding 5 formed as shown in FIGS. 2 and 3 is elastically deformed as shown in FIGS. 4 and 5 by applying an external force and compressing its outer diameter, and the open portion 7 is eliminated and a circular shape is formed. A part of the circumference overlaps, and the relationship between the outer diameter and the inner diameter d of the core 1 is D<d, and in this state, the winding storage groove 2
It can be inserted inside. And here, release the external force K
Therefore, we try to recover to the state shown in Figures 2 and 3, but
The inner diameter of the winding storage groove 3 makes the outer diameter of the winding 5 as shown in FIGS. 6 and 7, and di=D. As a result, if the winding [5] has the same diameter as the winding storage groove 2, it is held in the winding storage groove 2, and if it has a larger diameter than the winding storage groove #12, it is held in a shape that presses the winding storage groove 2. It is installed and stored. Incidentally, the winding 5 has one turn, and can be formed simply and easily using a jig or the like.

In this way, in the rotary transformer of this embodiment, the winding is simply and easily formed externally, and the outer diameter is compressed and fixed in the winding storage groove of the core by external force, so there is no need for complicated equipment as in the past. At the same time, an ffc layer can also be formed inside the core with a small inner diameter.
I71 stability of holding and fixing can be ensured, and the number of work steps can be reduced.

〔Effect of the invention〕

As described above, the rotary transformer of the present invention has the advantage that it can reduce the number of man-hours without requiring any special equipment, can iron-layer the windings in the winding convergence groove, and can also be made smaller. : It is something that one has.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of an embodiment of the rotary transformer of the present invention, @
Figures 2 and 3 are plan views and front views of the winding in Figure 1 in its free state, and Figures 4 and 5 are the same state in which the outer diameter of the winding is compressed to push the winding into the core. The plan view, front view, and FIGS. 6 and 7 are also plan views of the windings in the core,
It is a front view. 1...Core 2...Volume-storage groove 3...
・Inner diameter of winding storage groove 5...Winding 6...Winding pull-out part 7...Opening part・-1-Go' Agent Masaru Ogawa Patent attorney Figure 1 Figure 7 Figure 14 Ball figure

Claims (1)

[Claims] 1. In a rotary transformer formed in a cylindrical shape that transmits signals between a rotating part and a fixed part of a rotary head drum device of a home video tape recorder, a rotary transformer formed on the inner peripheral surface of the cylindrical core is The winding installed in the winding storage groove is
The winding is formed into one turn having a substantially circular shape in which an open part is formed in a part of the circumference in a free state, and the winding is taken out from the winding end of the open part, which is perpendicular to the plane containing the winding. The diameter of the outermost circumference of the winding is at least larger than the inner diameter of the winding storage groove, and the maximum circumferential length of the winding excluding the open part is the maximum circumference of the winding storage groove. A rotary transformer characterized in that the transformer is formed shorter than the circumference length, is elastically deformed by applying an output and compressing the outer diameter, and is installed and fixed in the winding storage groove.